antony: ah bummer, i think i'll leave this big job till next year n settle with topping up oil. socket n mallet sounds like a descructive way to remove the collets. thinking wether i should try it on the old head or reassemble and ebay the old head? unless someone needs it?
thx soixantaine, i just like to get my hands dirty and get things sorted there n then, driven by desire to fix things 
frank was that bout anthony or mine?
